Disc brake piston cap and disc brake equipped therewith
AssigneeChassis Brakes International B.V.
InventorsPascal Champion, Philippe Barret, François Daguzan, Thierry Bindner
Life of this patent
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Abstract
Disc brake piston cap (3) interposed between the caliper (1) and the piston (2) to protect the piston (2). The cap (3) has a bulge (351) on the inner fold (35) which is engaged in the groove (22) of the piston (2), and has an overmoulded insert (31) fixed to the annular groove (11) of the caliper. The folded cap (3), with the overmoulded insert (31), intermediate folds (33, 34) and an outer fold (32), comprises longitudinal ribs (352) on the face of the inner fold (35) to stiffen this fold and allow air to pass from the inside to the outside around the bulge (351) of the inner fold (35), housed in the groove (22).
Claims10
A disc brake piston cap interposed between the caliper (1) and the piston (2) to protect the piston against attack (from liquids and solids), this cap being made up of a bellows-style concertina-folded boot having an outer edge and an inner edge to be housed in an annular groove (11) of the caliper (1) at the mouth of the bore (12) accommodating the piston (2), the outer edge of the cap being fixed to the caliper at the outer side (111) of the annular groove (11) and its inner edge being provided with a bulge housed in a groove (22) of the piston (2),
- the piston cap being characterized in that
- the inner fold (35) of the cap (3) is situated between the groove (22) of the piston (2) and the inside of the caliper (1) and has longitudinal ribs (352) on its face pressed against the piston (2) to allow air to pass and in that the inner fold (35) is connected by an articulation (342) to an outwardly facing intermediate fold (34) itself connected by an articulation (341) to an inwardly facing intermediate fold (33) connected by an articulation (331) to an outwardly facing outer fold (32), itself connected by an articulation (321) to the overmoulded insert (31), and
- the inner articulations (331, 342) are equipped with studs (38) to press against the bottom (112) of the annular groove (11) of the caliper while allowing air to pass between the studs.
Dependencies are inferred from the claim text.